US9276323B2 - Dual polarization antenna for a mobile communication base station, and multiband antenna system using same - Google Patents

Dual polarization antenna for a mobile communication base station, and multiband antenna system using same Download PDF

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Publication number
US9276323B2
US9276323B2 US13/982,952 US201213982952A US9276323B2 US 9276323 B2 US9276323 B2 US 9276323B2 US 201213982952 A US201213982952 A US 201213982952A US 9276323 B2 US9276323 B2 US 9276323B2
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radiation
arms
feeding
antenna
support
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US20130307743A1 (en
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Young-Chan Moon
Sung-Hwan So
In-Ho Kim
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KMW Inc
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KMW Inc
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/24—Polarising devices; Polarisation filters 
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/108—Combination of a dipole with a plane reflecting surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/10—Resonant antennas
    • H01Q5/15—Resonant antennas for operation of centre-fed antennas comprising one or more collinear, substantially straight or elongated active elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/42—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more imbricated arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/48—Combinations of two or more dipole type antennas

Definitions

  • the present invention relates to a mobile communication (PCS, cellular, IMT-2000, and the like) base station antenna, and more particularly, to a dual polarization antenna and a multiple band antenna system using the same.
  • PCS mobile communication
  • cellular cellular
  • IMT-2000 IMT-2000
  • the present invention relates to a mobile communication (PCS, cellular, IMT-2000, and the like) base station antenna, and more particularly, to a dual polarization antenna and a multiple band antenna system using the same.
  • the mainly used frequency bands are low frequency bands (698 to 960 MHz) and high frequency bands (1.71 to 2.17 GHz or 2.3 to 2.7 GHz).
  • the multiple antenna based MIMO (Multiple Input Multiple Output) technology is an essential technology for increasing data transmission speed, and is applied to recent mobile communication network systems such as LTE (Long Term Evolution) and Mobile WiMAX.
  • triple band antennas are urgently requested instead of dual band antennas. While a high frequency band is inserted into an installation space for a low frequency band antenna and thus a width of the low frequency band antenna may be maintained according to a dual band antenna, it is difficult to insert a high frequency band antenna without increasing an antenna width when a triple band antenna is realized.
  • Another aspect of the present invention is to provide a dual polarization antenna for a mobile communication base station for narrowing a width of the antenna and realizing a triple band antenna in a limited width, and a multiple band antenna system using the same.
  • a dual polarization antenna comprising: a reflection plate; and a radiation module comprising first to fourth radiation devices comprising first to fourth radiation arms having bending parts, respectively, wherein the bending parts of the first to fourth radiation arms are sequentially adjacent to each other and are symmetrical to each other in four directions to form a shape when viewed from the top, the first to fourth radiation devices have supports integrally extending toward the reflection plate at the bending parts of the first to fourth radiation arms, and the radiation module comprises a first feeding line installed to transfer signals to the first and third radiation arms and a second feeding line installed to transfer signals to the second and fourth radiation arms.
  • a multiple band antenna system comprising: a reflection plate; a first radiation module comprising first to fourth radiation devices comprising first to fourth radiation arms having bending parts, respectively, wherein the first to fourth radiation arms are disposed on the reflection plate such that the bending parts are sequentially adjacent to each other and form a shape when viewed from the top; and a second or third radiation module installed on the reflection plate at a least one of upper and lower sides of left and right sides of the installation site of the first radiation module having the shape.
  • a dual polarization antenna for a mobile communication base station and a multiple band antenna system using the same can optimize a structural arrangement and antenna size of the dual polarization antenna to facilitate design of the antenna and narrow a width of the antenna and realize a triple band antenna in a limited width.
  • FIG. 2 is a plan view showing a virtual structure for realizing a triple band dual polarization antenna using the antenna of FIG. 1 .
  • FIG. 5 is an enlarged perspective view of a central upper end of FIG. 1 .
  • FIG. 6B is a perspective view of a second modification structure of FIG. 1 .
  • FIG. 7 is a schematic plan view showing a multiple band antenna system using the dual polarization antenna according to the embodiment of the present invention.
  • FIG. 8A is a plan view showing a modification structure of FIG. 7 .
  • FIG. 9 is a view showing a dual polarization forming state in a dual polarization antenna according to another embodiment of the present invention.
  • FIG. 1 is a perspective view showing an example of a conventional dual polarization antenna, and shows a structure disclosed in U.S. Pat. No. 6,034,649 of ‘Andrew Corporation’.
  • a radiation module 1 in the conventional dual polarization antenna, a radiation module 1 has first and second dipoles 1 a and 1 b installed to cross each other, and thus is realized in an ‘X’ form as a whole.
  • the first dipole 1 a includes two half dipoles 1 a ′ and 1 a ′′, which are installed at +45 degrees with respect to a vertical axis or a horizontal axis, and the second dipole 1 b also includes two half dipoles 1 b ′ and 1 b ′′, which are installed at ⁇ 45 degrees.
  • the half dipoles 1 a ′, 1 a ′′, 1 b ′, and 1 b ′′ of the first and second dipoles 1 a and 1 b are supported on a reflection plate by a balun and a base
  • signals are transferred in a non-contact coupling method by a plurality of microstrip hooks 3 generally similar to a hook shape between the two half dipoles 1 a ′ and 1 a ′′ of the first dipole 1 a and between the two half dipoles 1 b ′ and 1 b ′′ of the second dipole 1 b .
  • a plurality of clips 4 are installed to support the plurality of microstrip hooks 3 and maintain intervals between the microstrip hooks 3 and the dipoles.
  • the present invention provides a new form of an antenna structure, escaping from the conventional X form dipole structure, which minimizes a width of the antenna particularly when a triple band antenna is applied.
  • FIG. 3 is a perspective view showing a structure of a dual polarization antenna according to an embodiment of the present invention, in which a feeding structure is schematically shown by dotted lines for convenience' sake.
  • FIG. 4 is a cutaway sectional view taken along line A-A′ of FIG. 1 .
  • FIG. 5 is an enlarged perspective view of a central upper end of FIG. 1 , in which a cut form including the feeding structure is shown.
  • the dual polarization antenna may be realized by a first radiation module 10 for a first frequency band (for example, a frequency band of about 700 to 1000 MHz).
  • the first radiation module 10 includes bending parts, and for example, includes first to fourth radiation devices including first to fourth radiation arms 11 , 12 , 13 , and 14 having a shape, respectively. Then, the bending parts of the first to fourth radiation arms 11 , 12 , 13 , and 14 are sequentially adjacent to each other and are symmetrical to each other in four directions to form a shape when viewed from the top.
  • a bending angle of the bending part of the first radiation device 11 may be, for example, a right angle, and includes first and second conductive radiation arms 11 a and 11 b in which ends of the ‘ ⁇ ’ shape form, for example, 90 degrees and which is designed to have a predetermined length. Then, a support 11 c integrally extending toward an antenna reflection plate 5 is formed at a connecting part of the first and second radiation arms 11 a and 11 b , that is, the bending part of the first radiation arm 11 .
  • the support 11 c may be fixedly attached to the reflection plate 5 through screw coupling or welding.
  • the second to fourth radiation arms 12 , 13 , and 14 includes first radiation arms 12 a , 13 a , and 14 a , second radiation arms 12 b , 13 b , and 14 b , and supports 12 c , 13 c , and 14 c .
  • the first to fourth radiation arms 11 , 12 , 13 , and 14 sequentially form and shapes in the shape. That is, the and parts are located in a third quarter plane, a fourth quarter plane, a second quarter plane, and a first quarter plane, respectively.
  • the first to fourth radiation devices are similar to dipole structures in their external appearances at a glance, but it can be seen that they actually employ a bow-tie structure. That is, as will be described below, the supports 11 c , 12 c , 13 c , and 14 c form parts of the feeding structure and the first radiation arms 11 a , 12 a , 13 a , and 14 a and the second radiation arms 11 b , 12 b , 13 b , and 14 b form suitable radiation surfaces according to a corresponding frequency on opposite sides of the supports 11 c , 12 c , 13 c , and 14 c .
  • the first radiation arms 11 a , 12 a , 13 a , and 14 a and the second radiation arms 11 b , 12 b , 13 b , and 14 b are configured such that a width of a surface (a lateral surface in the drawing) of a radiation device facing another radiation device is larger than a surface (an upper surface of the drawing) of the radiation device from which signals are radiated.
  • This configuration is done to minimize an influence to another radiation module and achieve a smooth radiation through impedance matching (adjustment) with an adjacent radiation arm.
  • Parallel surfaces for maintaining a preset space distance while facing striplines of the first and second feeding lines 21 and 22 are formed at central longitudinal axes of the supports 11 c , 12 c , 13 c , and 14 c so that signals are transferred therebetween through a non-contact coupling method.
  • Spacers 31 , 32 , 33 , and 34 having suitable structures for supporting the feeding lines 21 and 22 and maintaining the spacing between the feeding lines and the supports to be constant may be installed at preset locations between parallel surfaces of the supports 11 c , 12 c , 13 c , and 14 c and the strip lines of the first and second feeding lines 21 and 22 to maintain the spacing distance.
  • the spacers 31 , 32 , 33 , and 34 may include, for example, a female screw structure located between the paral surfaces of the supports 11 c , 12 c , 13 c , and 14 c and the strip lines of the first and second feeding lines 21 , and a male screw structure coupled to the female screw structure through holes formed at locations of the first and second feeding lines 21 and 22 and/or the supports 11 c , 12 c , 13 c , and 14 c.
  • the first and second feeding lines 21 and 22 cross each other (to be spaced apart from each other) at a middle part of the first radiation module 10 , and a spacer 41 having a suitable structure may be provided at the crossed part to prevent a contact between the two feeding lines and prevent a mutual influence of transmitted signals.
  • outer sides of the parallel surfaces of the first and second feeding lines 21 and 22 from central longitudinal axes of the supports 11 c , 12 c , 13 c , and 14 c that is, side surfaces of the supports 11 c , 12 c , 13 c , and 14 c further extend to surround the strip lines of the first and second feeding lines 21 and 22 .
  • the supports act as the ground terminals, the structure can show a more improved grounding performance. That is, since the extension structure is inclined toward the strip lines to surround the supports, loss of signals can be reduced.
  • a length of the supports is designed according to ⁇ /4 to achieve an open state (ground state).
  • the feeding structure of the present invention employs a so called over bridge method unlike a side bridge method in which the feeding lines are installed between side surfaces of radiation devices in a dipole structure as shown in FIG. 1 .
  • the supports include air strip balun structures serving as ground terminals of the feeding lines having a strip line structure in the feeding structure of the present invention
  • the feeding structure of the present invention can be realized more simply and efficiently as compared with a method of employing balum structures in the conventional radiation structures having the conventional dipole structure.
  • FIG. 7 is a schematic plan view showing a multiple band antenna system using the dual polarization antenna according to the embodiment of the present invention.
  • the multiple band multiple antenna system according to the embodiment of the present invention includes, for example, a first radiation module 10 for a first frequency band (for example, a frequency band of about 700 to 1000 MHz), second radiation modules 50 - 1 and 50 - 2 for a second frequency band (for example, a frequency band of 1.7 to 2.2 GHz), and third radiation modules 60 - 1 and 60 - 2 for a third frequency band (for example, a frequency band of 2.3 to 2.7 GHz).
  • a first radiation module 10 for a first frequency band for example, a frequency band of about 700 to 1000 MHz
  • second radiation modules 50 - 1 and 50 - 2 for a second frequency band (for example, a frequency band of 1.7 to 2.2 GHz)
  • third radiation modules 60 - 1 and 60 - 2 for a third frequency band (for example, a frequency band of 2.3 to 2.7 GHz).
  • the first radiation module 10 may have a dual polarization antenna structure according to the embodiment of the present invention shown in FIGS. 2 to 4 .
  • the second radiation modules 50 - 1 and 50 - 2 and the third radiation modules 60 - 1 and 60 - 2 are installed at upper and lower sides of left and right sides of the installation site of the first radiation module 10 having a shape as a whole. That is, assuming that the disposition structure of the antenna system forms a tetrahedral shape, the second radiation modules 50 - 1 and 50 - 2 and the third radiation modules 60 - 1 and 60 - 2 are installed at corners of the tetrahedral shape, respectively and the first radiation module 10 is installed at a center of the tetrahedral shape.
  • the first radiation module 10 having a shape has empty spaces at upper and lower portions of the left and right sides of the installation site, and the second and third radiation modules 50 - 1 , 50 - 2 , 60 - 1 , and 60 - 2 are installed such that the installation sites of the second radiation modules 50 - 1 and 50 - 2 and the third radiation modules 60 - 1 and 60 - 2 at least partially overlap the empty spaces of the installation site of the first radiation module 10 .
  • an entire size of the antenna system can be reduced and can be optimized when an antenna system of multiple bands, in particular, triple bands is realized.
  • FIGS. 8A and 8B show a plan view and a perspective view of the modified structure of FIG. 7 , and as shown in FIGS. 8A and 8B , all of the first to third radiation modules 10 may have the dual polarization antenna structure according to the embodiment of the present invention shown in FIGS. 2 to 4 .
  • the dual polarization antenna for a mobile communication base station according to the embodiment of the present invention and the multiple band antenna system using the same can be configured as described above. Meanwhile, although the detailed embodiments have been described in the description of the present invention, various modifications can be made without departing from the scope of the present invention.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)
  • Waveguide Aerials (AREA)
US13/982,952 2011-01-31 2012-01-31 Dual polarization antenna for a mobile communication base station, and multiband antenna system using same Active 2032-11-25 US9276323B2 (en)

Applications Claiming Priority (3)

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KR1020110009834A KR101711150B1 (ko) 2011-01-31 2011-01-31 이동통신 기지국용 이중편파 안테나 및 이를 이용한 다중대역 안테나 시스템
KR10-2011-0009834 2011-01-31
PCT/KR2012/000712 WO2012105784A2 (ko) 2011-01-31 2012-01-31 이동통신 기지국용 이중편파 안테나 및 이를 이용한 다중대역 안테나 시스템

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EP (1) EP2672568B1 (ja)
JP (1) JP5738437B2 (ja)
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US11043738B2 (en) * 2017-06-01 2021-06-22 Huawei Technologies Co., Ltd. Dual-polarized radiating element, antenna, base station, and communications system
US11196180B2 (en) * 2019-07-11 2021-12-07 Samsung Electronics Co., Ltd. Antenna module comprising dipole antenna and electronic device comprising the same
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EP2672568A2 (en) 2013-12-11

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